Аннотация
This article examines the internal hybridization of Kaiser hulls in Jonsson theory and the transfer of classical spectral properties to hybrid settings. The relevance of this study is determined by the need to distinguish internal hybrid constructions generated within a fixed Kaiser class from external hybrids of unrelated theories. The characteristic features of such internal constructions are analyzed within the framework of a fixed Kaiser-normal Jonsson theory. The necessity of stability conditions that preserve the Kaiser hull under admissible hybrid unification is identified and justified. Based on the conducted research, hybridization is considered as an internal operation on semantic fragments of a Jonsson theory. A technical criterion ensuring the preservation of the ambient Kaiser class of the semantic model under internal hybrid is formulated. We prove that, under Kaiser-normality, the semantic model of a hybrid remains within the original Kaiser class. It is shown that this fact makes it possible to transfer Morley-type categoricity criteria, Saracino-type perfection arguments, and Lindstro¨m-type model-completeness principles to Jonsson hybrid spectra. As a result, hybrid analogues of results on prime extensions, model perfection, and model completeness are obtained.